• 1. The gold knob opens the door.
  • 2. The silver knob opens the door.
  • 3. Neither the silver knob nor the gold knob open the door.
  • 4. The lead knob does not open the door.
Only one statement is true. But which? Only one knob opens the
door. Which?
>...gold
>...silver
>...copper
>...lead
Hint: Either statement 2 or statement 4 must be true. Answer: See #26.

Puzzle 6:


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page 102 . page 104

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